ITEM NAME:3-Step Sequential Flow Semi Dynamic Chase Flash Tail Light Module For Cars Parts 3-Step Sequential Flow Semi Dynamic Chase Flash Tail Light Module For Cars Parts SKU: Y000157441818295329 Everyone is a moon and has a dark side which he never shows to anybody..It can convert your front or rear turn signals standard flashing action to successive lighting. With the successional flash module box installed, your cars turn signal lights will get three sequential outputs with each flashing about 0.28 seconds for a full turn signal rotation of 0.85 secodns.